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The Synology DiskStation DS1513+ offers massive dynamically scalable storage space, stellar performance, a robust Web interface, and it supports a vast quantity of useful features for both home and small and medium business applications.

The five-bay Synology DiskStation DS1513+ might seem like overkill, and it's in fact a very advanced storage system, but the server turns out to be a system built for both general consumers and small and medium-size businesses. It's the prime example of how a NAS server can be so much more than just storage attached to your network.

There are some conditions that hard disk file system will also crash:

1, Sometimes, you wanna resize the partitons of hard drive. Enlarge system partition for exmple, this needs couples of minutes to do the job. And during the time, if the power turns off or the software that resizing your hard drive crashes, then the file system of your hard disk crashes as well.

2, Bad sectors. As the physical damage of hard disk, the bad sectors will act as virus. They will spread to everwhere in hard drive if you don't block them in time. Once there are too many bad sectors or the bad sectors appears at some particular places, like partition table or something like, hard drive can no longer read the partition and the data in this partition. And at this time, your partition is physically damaged.

3, Unexpected error. Computer systems, including operating system and file system, are weak. Not as strong as hardware, you can only use systems for 1 or 2 years, and then you need to reinstall them, but you can use the same hardware for more than 5 years. So systems are weak to meet the problem. And there are so many unexpected problem you will meet everyday in computer daily use.

So once the partition is damaged, you can no longer access that partition to read or modify the files. They only way for you, if you want to retrieve them, is to find and install a damaged partition recovery software to retrieve files from damaged partition. And after recovery, you can fix the damaged partition by formatting or fixing.